The World Health Organisation (WHO) is a specialised agency of the United Nations that is concerned with international public health. It was established on 7th April 1948 and is based in Geneva, Switzerland. As a body it has been instrumental in the eradication of smallpox. Its current priorities include communicable diseases, in particular HIV/AIDS, Ebola, malaria and tuberculosis; the mitigation of the effects of non-communicable diseases; sexual and reproductive health, development, and ageing; nutrition, food security and healthy eating; occupational health; substance abuse; and driving the development of reporting, publications, and networking. Recently, unlike other health institutions, WHO has chosen to address the thorny issue of gaming addiction; a condition that is still heavily disputed and lacks a universally agreed definition.